title: High temperature thermoelectric properties of Mo3Sb(7-x)Te(x) (0.0≤x≤1.8).
abstract: Polycrystalline Mo(3)Sb(7-x)Te(x) samples with nominal Te concentrations of x=0.0, 0.3, 1.0, 1.6 and 2.2 have been synthesized by a powder metallurgical route. High temperature thermoelectric properties measurements including thermopower (300-900 K), electrical resistivity (300-800 K) and thermal conductivity (300-1000 K) were carried out. The temperature and compositional variations of the thermopower can be satisfactorily explained by assuming a single parabolic band model with dominant acoustic phonon scattering. However, such a simple model fails to describe the electronic thermal conductivity for low Te concentration. The dimensionless figure of merit, ZT, increases on increasing both the temperature and the Te content to reach a maximum value of 0.3 at 800 K that can be extrapolated to ∼0.6 at 1000 K for Mo(3)Sb(5.4)Te(1.6).
authors.affiliation: Institut Jean Lamour, UMR CNRS-Nancy Université-UPVM 7198, Ecole Nationale Supérieure des Mines de Nancy, Parc de Saurupt, 54042 Nancy Cedex, France. christophe.candolfi@mines.inpl-nancy.fr
authors.forename: C
authors.initials: C
authors.lastname: Candolfi
authors.forename: B
authors.initials: B
authors.lastname: Lenoir
authors.forename: C
authors.initials: C
authors.lastname: Chubilleau
authors.forename: A
authors.initials: A
authors.lastname: Dauscher
authors.forename: E
authors.initials: E
authors.lastname: Guilmeau